2026-04-13Views：
Air compressor terminology mainly includes the following aspects:
terminology related to 1. pressure and pressure
pressure: Refers to the highest pressure of the air compressor discharge gas. The common unit of working pressure is bar or MPa. The discharge pressure given on the compressor nameplate is usually the gauge pressure.
Pressure: is the force per unit area generated by gas molecules on the container wall. Commonly used pressure units are bar, MPa, etc. In the air compressor industry, it is often said that "kg" refers to "bar", that is, 1kg is equal to 1bar.
Table pressure: The pressure measured at the zero point of atmospheric pressure is called table pressure, usually expressed as P(G).
Absolute pressure: The pressure at the zero point of absolute vacuum is called absolute pressure and is expressed by P(A).
Terminology Relating to 2. Flow and Volume
volume flow: also known as displacement or nameplate flow, refers to the gas volume discharged by the air compressor per unit time under a certain exhaust pressure. Commonly used units are m3/min and L/s.
Nominal flow rate: refers to the air compressor in the required exhaust pressure, the volume of gas discharged per unit time, converted to the value of the intake state. This value needs to be measured at the exhaust end and converted to the intake end.
Terminology relating to 3. gas quality and oil content
gas oil content: unit volume of compressed air contained in the oil (including oil droplets, suspended particles, oil vapor) quality. It is usually expressed in PPM(Parts Per Million), that is, the oil content per million parts.
Terminology relating to 4. temperature and dew point
pressure dew point: refers to a certain pressure of the gas cooled to a certain temperature, which contains unsaturated water vapor into saturated water vapor precipitation temperature. This temperature is the pressure dew point of the gas, indicating the degree of dryness of the gas.
Terminology related to 5. power and efficiency
specific power: refers to the power consumed by the air compressor to compress a certain volume of gas per unit time. This is an index for evaluating the performance of the compressor, and the unit is kW/m3 · min-1.
In summary, the term air compressor covers pressure, flow, gas quality, temperature and power. These terms help to more accurately describe and understand the performance and working status of the air compressor.
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